AS3500.3 Box & Eave Gutter Calculations
Budget: $250 – $750 AUD
I’m preparing construction documents for a small-scale residential roof (under 100 m²) that sits in a region with rainfall intensities above 100 mm/hr. I need verified hydraulic calculations that size the box gutter, associated rain head and the eave gutter so that the entire system complies with AS 3500.3 (2025).
Please run the full flow path analysis—catchment, flow rates, gutter cross-sections, sump / rain-head dimensions, downpipe sizing and overflow provisions—and present your working, references to the relevant clauses, and any assumptions. A concise PDF report plus the editable worksheet (Excel, Mathcad or similar) will be perfect. If you usually illustrate the results on a simple plan or section, feel free to include that as well; it helps the builder.
Deliverables
• Calculation report (PDF) referencing AS 3500.3 (2025)
• Editable calculation file
• Any supporting sketches or mark-ups
I will provide roof plans and site rainfall data on award. Let me know your expected turnaround and any clarifications you need so we can lock this in quickly.
Please run the full flow path analysis—catchment, flow rates, gutter cross-sections, sump / rain-head dimensions, downpipe sizing and overflow provisions—and present your working, references to the relevant clauses, and any assumptions. A concise PDF report plus the editable worksheet (Excel, Mathcad or similar) will be perfect. If you usually illustrate the results on a simple plan or section, feel free to include that as well; it helps the builder.
Deliverables
• Calculation report (PDF) referencing AS 3500.3 (2025)
• Editable calculation file
• Any supporting sketches or mark-ups
I will provide roof plans and site rainfall data on award. Let me know your expected turnaround and any clarifications you need so we can lock this in quickly.